Rug tufting machine



June 21, 1932,

J. E. CHALMAN RUG TUFTING MACHINE 4 Sheets-Sheet 1 Filed May 1, 193

I W i A June 21, 1932. J. E. 'CHALMAN 1,864,414

RUG TUFTING MACHINE Filed M 1, 1950 4 Sheets-Sheet 2 June 21, 1932.

J. E. CHALMAN RUG TUFTING MACHINE Filed May 1, i950 4 Sheets-Sheet 3 J 1932- J-. E. CHALMAN I RUG TUFTING MACHINE Filed May 1, 1930 4 Sheets-Sheet 4 Patented June 21, 1932 UNITED sTArrEs, PATENT orrrca JOHN E. CHALMANQOF CHICAGO, ILLINOIS, ASSIQ-NOR T0 UNION SPECIAL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF, ILLIN'QIS MACHINE 4 BUG TUEFTING' MACHINE Application filed May 1, 1930. Serial no. 448,977.

The invention relates to new and useful improvements in a rug tufting machine. In the application filed by Albert S. Riviere, July 10, 1928, Serial No. 291,550, there is shown and described and claimed .a machine for making rugs by tufting a fabric base. In this machine there is a former over which the" threads are laid between needle punctures. These loops are then severed to form the tufts. The present invention is an improvement on a machine of this application An object of the invention is to provide a machine wherein positively operating shear putting devices may be used for severing the 00 s.

1i: further objectof the invention is to provide a machine of the above type wherein the loops between needle punctures which are made over a forming plate are fed by the feed of the fabric between the cutting devices.

These and other objects will in part be obvious and will in part be hereinafter more fully described.

In the drawings, which show by way of illustration one embodiment of the invention:

Figure 1 is a view of a machine provided with the improvements, said view being taken from the rear of the machine and the work support broken away to show the structure of the machine-beneath the same.

Figure 2is a viewof the machine from the end thereof at which the tufting takes place. Figure 3 is a vertical sectional view through the machine showing the means forvibrating the needle and for operating the cutting blade.

Figure 4 is a view partly in section and partly in plan on the line 4-4 of Fig. 2.

Figure 5 is a side elevation of the parts of the 'work support that is shown in Fig. 4.

Figure 6 is a view showing the formation of the loops and the severing of the same.

The inventionis directed to a machine for forming tufts in a fabric base. The fabric base is fed across a work support by a feeding mechanism of'the usual, type and the tufts are formed from' a needle thread or yarn through the aid of an eye-pointed needle and co-operating devices beneath the work support for securing the 100 s which are passed through the fabric base ythe needle. The needle thread between needle punctures is laid over a forming plate and thus loops of a definite length are formed. This is accomplished in the present machine by the lateral vibration of the needle so that the needle enters the fabric base first on one side of the forming plate and then on the other side thereof. In line with the forming plate is a stationary cutting member and a movable cutting member. The loops after they are formed are fed away from the stitching point by the feed of thefabric base, and these 100 s are moved on to the stationary cutting bla e, and as the movable cutting blade operates the loops are severed.

Referring more in detail to the drawings the invention is shown as applied to a sewing machine including a bed plate 1 carrying supporting posts or lugs 2' and 3 on which the work support 4 is mounted. A portion only of the work su port is shown in the drawings. The fabric is fiad across the work support by a feed dog 5 carried by a feed bar 6 pivoted to a feed rocker. 7. The feed rocker 7 is. oscillated by an arm 8 which is connected to a crank on a disc on an end ofthe main shaft 10.. The feed dog is raised and lowered by the usual lifting cam on the actuating shaft. he material is held on the work a presser foot 11 mounted on a presser bar 12 which in turn is mounted in the needle head 13 carried by the forward end of an overhangingarm 14 supported by the standard 15. The tufts are formed b needle 16 carried by needle bar 17 mounted in the needle head 13 and reciprocated by the y an eye-pointed support by usual devices. The needle bar 17 is mounted p 10. Co-operating with the needle beneath i 24. This oscillating segment is vibrated by means of a cam on a stub shaft which in turn is operated by a gear 26 co-operating with the gear 27 on the main actuating shaft the work support is a looper 28 mounted on a looper carrier 29. iFlxed to the presser foot 11 is a forming plate 30. The needle 16 penetrates the fabric base first on one side of this forming plate and then on the other side thereof. The looper enters the loop formed by the needle which is passed through the fabric base and thus secures the thread to the fabric base. The thread between consecutive needle punctures is led in loop form over this forming plate 30. The loops are shown in Figure 6 at Z. The machine, sofar as it has been described in detail, is similar to the machine shown in the Riviere application referred to above. In said application the thread loops are carried by the feed of the fabric base rearwardly on the former against a cutting edge on the former. The present invention has to do with an improved cutting mechanism for severing the loops which are laid over this former. The rear portion of the former is provided with a shear edge 31 and this serves as a stationary cutting member. It is true that said member moves up and down with the presser foot, but otherwise it is stationary. The loops Z as they are carried rearwardly on the former will be carried on to this stationary cutting member 31. Co-operating with the stationary cutting member is a movable cutting blade 32. This cutting blade 32 is pivotally mounted on a supporting stud 33 attached to the shank of the presser foot. Encircling this stud is a spring which presses against the cutting blade and also against a head 35 on the end of the stud, and thus it is that the cutting blade 32 is yieldingly forced into shearing contact with the stationary member or blade. The cutting blade 32 is connected to an arm 34 and said arm 34 carries a ball stud 36 to which a link 37 is connected. The link 37 is connected at its other end to a ball stud 38 carried at the lower end of an arm 39L The arm 39 is fixed to a sleeve 40 mounted for free oscillation on the end of the shaft 21. There is a sleeve 40*. Also mounted on the shaft 21 is a third sleeve 40*. These three sleeves 40, 40 and 40 are connected by a flat bar 41. This makes up an oscillating unit which oscillates freely on the shaft 21 and is supported thereon.

It is prevented from endwise movement on the shaft 21 by suitable collars. Fixed to this member 41 and projecting laterally therefrom is an arm 42. This arm 42 is slotted at 43. A ball stud 44 is adj ustably mounted in the slot43. On the main actuating shaft 10 there is an eccentric 45. An eccentric strap 46 cooperating with this eccentric 45 is connected to this ball stud 44. Thus it is that the actuating shaft as it rotates will impart oscillations to the movable trimming blade or member 32.

The former 30 over which the loops are laid has an inclined face 30 in the region of the needle and the upper face of the Stationary cutting member is substantially hori zontal. This enables a suflicient slack to be givento the loop as it is fed down the inclined face so that it may be readily moved along the former and on to this stationary cutting blade. As the loops move undernear the front end of the movable trimming member they will be severed. The point where the severing takes place is very close to the needle and this enables the fabric base to be fed in a curved line if desired. The placing of the loops in the cutting mechanism and the severing of the loops impose no strain whatever on the feeding mechanism of the machine.

It is obvious that minor changes in the details of construction and the arrangement of the parts may be made without departing from the spirit of the invention set forth in the appended claims.

, Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A rug tufting machine comprising the Work support, a feeding mechanism, a thread carrying needle, complemental stitch forming mechanism co-operating therewith, means for forming loops in the needle thread between consecutive stitches, shearing devices for severing the loops to .form tufts and means for operating the shearing devices in timing with the feeding mechanism.

2.-A rug tufting machine comprising a work support, a feeding mechanism, a thread carrying needle, means for vibrating said needle laterally, complemental stitch forming mechanism co-operating with the needle, means for forming loops in the needle thread between consecutive stitches, and positively operated shearing devices for severing the loops to form tufts.

3. A rug. tufting machine comprising a work support, a feeding mechanism, a thread carrying needle, a thread carrying looper cooperating w'th the needle, means for forming loops in the needle thread between consecutive stitches, shearing devices located in the rear of the needle and including a stationary severing member on to which the loops are fed from the forming means, and a movable cutting member for severing the loops.

4. A rug tufting machine comprising a work support, a feeding mechanism, a thread carrying needle, a thread carrying looper cooperating with the needle,means for forming loops in the needle thread between consecutive stitches, shearing devices located in the rear of the needle and including a stationary severingmember on to which the loops are fed from the forming means, and a movable cutting member for severing the loops,

'said forming means including a plate formed integral with and in line with the stationary cutting member.

5. A rug. tufting machine comprising a work support, a feeding mechanism, a thread carrying needle, a thread carrying looper cooperating with the needle, means for forming loops in the needle thread between consecutive stitches, shearing devices. located in the rear of the needle and including a stationary severing member, on to which the loops are fed from the forming means, and av movable cutting member for severing the loops, said forming means stationary cutting member, said forming member in the region of the needle having a downwardly inclined face leading to the cutting edge of the stationary cutting member which is substantially horizontal.

I 6. A rug tufting machine comprising a work support, a feeding mechanism, a thread carrying needle,.a looper co-operating with the needle, a forming plate, said forming plate and needle. having a relative movement whereby loops are laidover theforming plate between consecutive stitches and cutting devices for receiving and cutting the formed loops including a stationary cutting member and a movable cutting member, said stationary cutting member being in line with the forming plate so that the loops will be fed from the forming plate on to the stationary cutting member.

7. A rug tufting machine comprising a work support. a feeding mechanism, a presser foot, a thread carrying needle, a looper 00- operating with the needle, a forming plate carried by the presser foot over which loops are formed in the needle thread between consecutive stitches, cutting devices carried by the presser foot and including a stationary cutting member in line with the forming plate whereby the loops are fed from the forming plate on to the stationary cutting member, and a movable cutting member co-operating with said stationary member for severing the formed loops.

8. A rug tufting machine comprising a work support, a feeding mechanism, a presser foot, a thread carrying needle, a. looper 00- operating with the needle, a forming plate carried by the presser foot over which loops are formed in the needle thread between consecutive stitches, cutting devices carried by the presser foot and including a stationary including a plate formed integral with and in line with the crating with the needle, a forming plate car ried by the presser foot over which loops are formed in the needle thread between consecutive stitches, cutting devices carried by the presser foot and including a stationary cutting member in line with the forming plate whereby the loops are fed from the forming plate on to the stationary cutting member, and a movable cutting member co-operating with said stationary member for severing the formed loops, said movable cutting member I being mounted on a stud on said presser foot, a spring encircling said stud and bearing against said movable member for holding the same yieldingly pressed against the stationary member.

10. A rug tufting machine comprising a work support, an overhanging arm, a presser foot, a feeding mechanism, an actuating shaft, a thread carrying needle, alooper cooperating with the needle, a shaft mounted on said overhanging arm, means for oscillating said shaft for moving said needlelaterally, a forming plate carried by the presser foot over which loops are formed between consecutive stitches, cutting devices carried by the presser foot and including a stationary member in line with the forming plate so that the loops are fed from the forming plates on to the said stationary member and a movable cutting member co-operating with said stationary member, oscillating means carried by the shaft on the overhanging arm and connected to said movable member for oscillating the same, an arm'carried by said oscillating means, an eccentric on the actuating shaft and an eccentric strap co-operating therewith and connected to said arm.

11. A rug tufting machine comprising a work support, an overhanging arm, a presser foot, a feeding mechanism, an actuating shaft,

a thread carryin needle, a looper co-operating with the" nee le, a shaft mounted on said overhanging arm, means for oscillating said shaft for moving said needle laterally, a forming late carried by the presser foot oyer whic loops are formed between consecutive stitches, cutting devices carried by the presser foot and including a stationar member in line with the forming plate so t at the loops are fed from the forming plate on to the saidv stationary member and a moyable cutting member co-operating with sa1d stationary member, oscillating means carried by the shaft on the overhanging arm and connected to said movable member for oscillating the same, an arm carried by said oscillating means,

an eccentric on the actuating shaft and an eccentric strap co-oper ating therewith and connected to said arm, the said eccentric strap having an adjustable connection with said arm whereby the stroke of the cutting member may be varied.

In testimony whereof, I aflix my si ature.

- JOHN E. CHAL AN. 

